air filter sits in the fenderwell. You'll have to remove the resonator there.
Not too many people have dyno'd their Aveo so it's hard to know exact numbers.
I'm on an Elantra board where people have done baseline + mod dynos. I know it's not a direct comparison, but it's something to work with (dyno on 4 cyl MAP based engine):
barring heat soak (i.e. hood open so the SRI gets a lot less underhood hot air) both the SRI and CAI (same filter, same tube diameter) gave the same HP gains, ~5 hp. The CAI also had 5 lb-ft torque increase, while the SRI did not show any increase in torque (longer tube of the CAI increases air intake velocity... dunno how VGIS would affect this).
Now it you take into account underhood temps, SRI gains vs the CAI will decrease fo'sho.